Migrate to 1.0.0 library

[Limess]

The Java client library has released a 1.0.0 version: https://github.com/prometheus/client_java/releases/tag/v1.0.0

The main draws of using this are:

• Opentelemetry compatibility
• Native histograms

This new major version has some fairly major API changes which break the current iapetos model: https://prometheus.github.io/client_java/migration/simpleclient/. Particularly, Collectors no longer exist.